jon: thank you, a massive dust cloud swallows a major u.s. city, crippling travel, knocking out power. what's behind this monster storm? >>> plus a frightening new warning for u.s. airlines, terrorists, having trouble getting people to carry bombs outside the body, might try to put them inside a body to take down a jetliner. >>> and imagine living to be more than 100 years old. how about living to be 1000? researchers say that reality is actually closer than you might think. we'll see you at the top of the hour. alisyn. alisyn: good stuff, jon, thank you very much. >>> well, he's leading all republican candidates in the polls and the pocketbook. mitt romney, far and away the fundraising champ of the 2012 season thus far. but does that mean he's going to win the nomination? we are live, looking at that from the nation's capitol. bill: we have dramatic videotape of a severe rain storm trap ago man under a bridge, check it out in las vegas, a homeless man, holding on for dear life over an overpass, crews tethered him to a safety line and life ve